Ukuma Kwethambo: Isakhiwo Nomsebenzi Emzimbeni Womuntu
Amathambo ayisici esibalulekile sesimiso samathambo somuntu, ahlinzeka ngokusekelwa kwesakhiwo, avikele izitho ezibalulekile, avumela ukunyakaza, futhi adlala indima ekukhiqizweni kwamaseli egazi kanye nokugcinwa kwamaminerali. Kulesi sihloko, sizohlola izimo ezahlukene zamathambo emzimbeni womuntu, ukuthi lezi zakhiwo zinegalelo kanjani ekusebenzeni okuphelele, nokuthi kungani ukuhlukahluka ngakunye kubalulekile empilweni nasekusebenzeni kahle.
1. Isingeniso Samathambo
Okokuqala, kubalulekile ukuqonda ukuthi ithambo liyizicubu eziphilayo neziguquguqukayo. Nakuba lingabonakala liqinile futhi lingashintshi, ithambo lihlala lilungiswa, lapho izicubu ezindala zethambo zithathelwa indawo yizicubu ezintsha. Ithambo lakhiwe ngamaseli, imicu ye-collagen, kanye nesisekelo samaminerali, ikakhulukazi i-calcium phosphate, enikeza amandla nokuqina.
2. Ukuhlukaniswa Kwamathambo Ngokusekelwe Ebunjweni
Kunezinhlobo ezinhlanu eziyinhloko zamathambo ezihlukaniswe ngesimo: amathambo amade, amathambo amafushane, amathambo asicaba, amathambo angajwayelekile, namathambo e-sesamoid. Isigaba ngasinye sinezici ezihlukile ezihambisana nendima yaso emzimbeni.
a. Amathambo Amade
Izibonelo ezisobala kakhulu zamathambo amade amathambo engalo nemilenze, njenge-femur (ithambo lethanga), i-tibia (ithambo lesifuba), kanye ne-humerus (ithambo lengalo elingaphezulu). Lawa mathambo amade asebenza njengezikhonkwane ezibalulekile zokunyakaza. Adebeselelwe aneziphetho ezimbili ezikhulisiwe (ama-epiphyses) kanye nesigaba eside esiphakathi (i-diaphysis). Umgodi ongaphakathi kwamathambo amade (i-medullary cavity) uqukethe umongo wethambo ophuzi, ogcina amafutha, kanti ezinganeni, umongo wethambo obomvu, lapho kwenzeka khona ukukhiqizwa kwamangqamuzana egazi.
b. Amathambo Amafushane
Amathambo amafushane acishe abe sesimweni se-cube futhi atholakala esihlakaleni (carpals) nasemaqakaleni (tarsals). Umsebenzi oyinhloko wamathambo amafushane ukunikeza ukuzinza nokusekela ukunyakaza okubushelelezi, njengasesihlakaleni, okuvumela ukunyakaza okubanzi nokuzinza.
c. Amathambo Ayisicaba
Amathambo ayisicaba, njengekhanda, i-sternum (ithambo lesifuba), kanye ne-scapula (amahlombe), anezingqimba ezimbili zamathambo aqinile ahlanganiswe phakathi kwawo ngengqimba enjengesiponji. Umsebenzi oyinhloko wala mathambo ukuvikela izitho zangaphakathi nokuhlinzeka ngendawo enkulu yokunamathela kwemisipha. Isibonelo, ikhanda livikela ubuchopho, kanti i-sternum kanye nezimbambo kuvikela inhliziyo namaphaphu.
d. Amathambo Angajwayelekile
Lawa mathambo awahambelani kahle nezigaba zangaphambilini ngenxa yezimo zawo ezihlukile. Isibonelo, umgogodla (i-vertebrae) kanye nethambo lomhlathi (i-mandible). Izimo eziyinkimbinkimbi zamathambo angajwayelekile ziwavumela ukuthi enze imisebenzi ekhethekile, njengokusekela izakhiwo zomzimba eziyinkimbinkimbi noma ukuvikela uhlelo lwezinzwa oluphakathi uma kwenzeka amathambo amathambo amathambo ephukile.
e. Amathambo e-sesamoid
Amathambo e-sesamoid amathambo amancane afakwe emisipha, isibonelo esaziwa kakhulu yi-patella (i-kneecap). Lawa mathambo avikela imisipha ekucindezelekeni nasekugugeni futhi andise ukusebenza kahle kwemisipha ngokushintsha i-engeli yendlela yemisipha, okwandisa amandla emisipha.
3. Umsebenzi Wamathambo Osekelwe Ebunjweni
Uhlobo ngalunye lwethambo lunomsebenzi othize, ngokwesimo salo esiyingqayizivele:
– Ukusekela Nokuvimbela Ukuwa: Amathambo amade emilenzeni asiza ekusekeleni isisindo somzimba futhi avimbele isakhiwo somzimba ekuweni lapho umi.
– Ukunyakaza Nokuguquguquka: Ukuma kwe-cuboid kwamathambo amafushane kuvumela ukuguquguquka okwengeziwe emalungeni, okuvumela ukunyakaza okuncane kodwa okubalulekile okudingekayo emisebenzini efana nokubhala noma ukubamba.
– Isivikelo: Amathambo ayisicaba nangavamile avikela izitho ezibalulekile ngesimo sazo esiyisicaba nesiyinkimbinkimbi.
– Ukusebenza Kahle Kwemisipha: Amathambo e-sesamoid andisa ukusebenza kahle kwemisipha futhi avikele imisipha ekucindezelekeni ngemva kwemisebenzi ehlukahlukene yomzimba.
4. Ukukhula Nokuthuthukiswa Kwamathambo
Ukukhula kwamathambo kuqala ngaphambi kokuzalwa futhi kuqhubeke kuze kube yilapho umuntu eneminyaka engu-25. Le nqubo iqala nge-cartilage, bese kuba yi-ossification, lapho kufakwa khona i-calcium namanye amaminerali ukuze kuthathelwe indawo i-cartilage ngethambo eliqinile. Amapuleti e-epiphyseal ekugcineni kwamathambo amade yizindawo eziyinhloko zokukhula, ezibangela ukwanda kwamathambo ngokuhamba kwesikhathi.
5. Izifo Nezinkinga Ezihlobene Namathambo
Ukuphazamiseka kwesimo samathambo nokusebenza kwawo kungathinta kakhulu impilo. Ezinye izimo zifaka phakathi i-osteoporosis, lapho amathambo eba buthakathaka khona futhi abe sengozini enkulu yokuphuka, noma i-scoliosis, ukukhubazeka komgogodla.
Ulwazi oluphelele ngokwakheka kwamathambo kanye nokusebenza kwawo kubalulekile ekuxilongeni nasekwelapheni lesi sifo. Ukungenelela kwezokwelapha, njengokwelashwa ngokomzimba, izithasiselo zokudla, noma ukuhlinzwa, kuvame ukudingeka ukuze kulawulwe lesi simo.
6. Isiphetho
Ukuqonda izimo ezahlukene zamathambo kanye nezindima zawo ngabanye kugcizelela ukubaluleka kwempilo yamathambo empilweni yansuku zonke nasezimweni ezithile zezokwelapha. Ngokunikeza ukwesekwa, ukuvikelwa, kanye nokunyakaza, amathambo, ngezindlela zawo ezahlukene, ayisici esiqinile nesibalulekile somzimba womuntu. Ngakho-ke, ukugcina impilo yamathambo ngokudla okufanele, ukuzivocavoca, kanye nokuhlolwa njalo kwezokwelapha kubalulekile ukuqinisekisa ukuthi amathambo ethu angasisekela kukho konke ukuphila.
